tekmarNet®4 Thermostat 538

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Control Description The tekmarNet®4 thermostat 538 is a basic one stage heating thermostat that includes the functionality of a Floor or Outdoor Sensor. The 538 can operate as a stand alone device, or communicate with a group of tekmarNet®4 thermostats.

Literature	—	D 538, J 538, U 538
Control	—	Microprocessor PID control; This is not a safety (limit) control
Packaged weight	—	0.8 lb. (380 g), Enclosure J, white PVC plastic
Dimensions	—	2-7/8" H x 2-7/8" W x 13/16" D (73 x 73 x 21 mm)
Approvals	—	CSA C US, CSA/UL 61010-1, meets Class B: ICES and FCC Part 15
Ambient Conditions	—	Indoor use only, 36 to 122°F (2 to 50°C).
	—	RH max 92% to 104°F (40°C), and 50% above 104°F (40°C)
	—	Altitude < 9840 feet (3000 m), Installation Category II, Pollution Category 2
Power Supply	—	24 V (ac) ± 10% 50/60 Hz, 1.8 VA Standby, 56 VA fully loaded, NEC / CEC Class 2
W Relay	—	24 V (ac) 2 A
Sensors	—	NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
Included	—	None
Optional	—	tekmar type # 071, 070, 072, 073, 076, 077, 078, 079, 083, 084

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Literature

Control

Packaged weight

Dimensions

Approvals

Ambient Conditions

Power Supply

W Relay

Sensors

Included

Optional